On Tue, 16 May 2017 19:29:37 +0200, Jiri Pirko wrote: > From: Jiri Pirko <j...@mellanox.com> > > Allow user to set control action "goto" with filter chain index as > a parameter. > > Signed-off-by: Jiri Pirko <j...@mellanox.com> > --- > include/linux/pkt_cls.h | 16 +++++++++++++++- > man/man8/tc-ife.8 | 2 +- > man/man8/tc-pedit.8 | 2 +- > man/man8/tc-police.8 | 2 +- > man/man8/tc-vlan.8 | 2 +-
Jiri, this *seriously* needs a proper documentation. I consider myself to be well above average in understanding tc filters and actions, and as you know I participated at least passively in some chats about the chains. Yet I'm still very lost in semantics of chains. I cannot imagine how an average user would be able to use this. Some questions about the semantics: - What chain(s) are processed by default? If I don't use goto_chain but have multiple chains, will only chain 0 be processed, or more? In what order, what are the rules? If I don't have a chain 0, what would happen? - What is the relation between priorities and chains? I expected that chains are under the same priority but that's not the case in your example. For a user, it's very unclear why there are priorities and chains. They appear to do the same thing, why can't I just jump between priorities? Please, in addition to explaining here on the list, add detailed explanation to the man pages. Thanks, Jiri
